CALIBRATION FOR WIRELESS LOCATION SYSTEM

An external calibration method comprises the steps of transmitting a fir st reference signal from a reference transmitter; receiving the first reference signal at first and second receiver systems: (10-2A-10-2C); determining a first err or value by comparing a measured TDOA value with a theoretical...

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Bibliographische Detailangaben
1. Verfasser:	STILP, LOUIS A
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	An external calibration method comprises the steps of transmitting a fir st reference signal from a reference transmitter; receiving the first reference signal at first and second receiver systems: (10-2A-10-2C); determining a first err or value by comparing a measured TDOA value with a theoretical TDOA value associated with the known locations of the receiver systems and the known location of the reference transmitter; and utilizing the first error value t o correct subsequent TDOA measurements associated with a mobile transmitter to be located. An internal calibration method comprises the steps of injecting a comb signal into the first receiver system: utilizing the comb signal to obtain a n estimate of the manner in which the transfer function varies across the bandwidth of the first receiver system; and utilizing the estimate to mitiga te the effects of the variation of the first transfer function on the time measurement made by the first receiver system.